JP7264655B2 - electric junction box - Google Patents

Description

The present invention relates to electrical junction boxes.

Conventionally, an electric connection box (also called a junction box, fuse box, relay box, etc.) is installed in a vehicle such as an automobile and collectively stores connection processing parts such as wire harnesses and electronic parts such as fuses and relays. Are known.

In the electric junction box, the internal temperature rises due to the heat generated from the connection processing components and the contacts of the electronic components housed therein. For example, a heat radiator having a plurality of heat radiating fins is attached to the outer circumference of an electric wire protruding from an electrical junction box (see Patent Document 1). In addition, there is a case in which a thermally conductive member made of a soft resin material with high thermal conductivity and having a plurality of heat radiation portions radially extending from one end of a simple round bar is arranged from the inside of the housing to the outside (Patent Document 2). Also, there is a heat pipe in which a working fluid is enclosed in a sealed tubular body, which is arranged from a heat collecting portion inside the housing to a heat radiating portion outside the housing (see Patent Document 3). Further, there is a type in which an insulated wire is connected to a heat generating portion of a bus bar and the insulated wire is pulled out from the inside of a housing (see Patent Document 4).

JP-A-10-42428 JP-A-2000-69643 JP-A-10-285751 Japanese Utility Model Publication No. 3-91015

By the way, some of the above-mentioned conventional heat dissipating members are made of insulating resin material, and are directly attached to the electric wire pulled out from the inside of the housing, or wrapped in an insulating tape together with the electric wire. Further, there is a bus bar in which a holding portion for a heat radiating member is formed, or a conductor of an electric wire is connected for heat radiation. Thus, there is room for improvement in terms of the degree of processing and ease of assembly.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electric connection box that can suppress temperature rise due to energization without changing the conventional structure and assembly method.

In order to achieve the above object, an electrical connection box according to the present invention includes a housing housing one or more electronic components, a conductive member electrically connected to at least the electronic components, and provided in the housing. an insertion space communicating with the outside of the housing through an opening; an accommodation space accommodating the conductive member and communicating with the insertion space; and an insertion space through the opening. an electric wire with a terminal that is electrically connected to the conductive member in the housing space and supplies power to the electronic component from the outside of the housing through the conductive member; a heat radiating member thermally connected to at least one of the electric wire with terminal and the conductive member in the housing space, the heat radiating member protruding from the housing space into the insertion space and into the opening. The heat dissipating member includes at least one bent portion, a thermal connection portion thermally connected to the terminal-equipped wire, and the thermal connection from the thermal connection portion through the bent portion. and an extending portion extending downward in a vertical direction intersecting the extending direction of the portion .

In the electrical connection box , the thermal connection portion is fastened to a fastening member arranged in the accommodation space portion together with the terminal of the electric wire with the terminal and the conductive member.

In the electric junction box , the thermal connection portion is electrically connected to the electric wire with the terminal in a fastening state in which the terminal of the electric wire with the terminal and the conductive member are fastened to the fastening member disposed in the housing space. A locking mechanism locks a locking piece erected from the end of the conductive member connected to the .

In the electric junction box, the heat radiating member is configured such that, in a connected state in which it is thermally connected to at least one of the electric wire with terminal and the conductive member, the end of the extending portion is located below the terminal of the electric wire with terminal. It is located between the end and said opening.

In order to achieve the above object, the electrical connection box according to the present invention includes a conductive member electrically connected to at least the electronic component, and a conductive member provided in the housing and connected to the outside of the housing through an opening. an insertion space that communicates with the conductive member; an accommodation space that accommodates the conductive member and communicates with the insertion space; a terminal-equipped wire that is electrically connected to the housing and supplies power to the electronic component from the outside of the housing through the conductive member; a heat radiating member thermally connected to at least one of the housing space, the heat radiating member protruding from the housing space into the insertion space and extending toward the opening; a side cover attached to the housing and extending downward; and a guide portion for guiding the side cover from the upper side toward the lower side. It is formed by a cover, and the side cover has a holding portion that holds the heat radiating member.

Advantageous Effects of Invention According to the electric connection box of the present invention, it is possible to suppress the temperature rise without changing the conventional structure and assembly method.

FIG. 1 is a perspective view showing a schematic configuration of an electric connection box according to the first embodiment. FIG. 2 is a partially exploded perspective view showing a schematic configuration of the electric connection box according to the first embodiment. FIG. 3 is a perspective view of a side cover that constitutes the electric connection box according to the first embodiment. FIG. 4 is a perspective view showing a schematic configuration of main parts of the electrical connection box according to the first embodiment. FIG. 5 is a partial vertical cross-sectional view showing a schematic configuration of the electrical connection box according to the first embodiment. FIG. 6 is a partially exploded perspective view showing a schematic configuration of an electric connection box according to the second embodiment. FIG. 7 is a perspective view showing a schematic configuration of main parts of an electric junction box according to the second embodiment. FIG. 8 is a partial vertical cross-sectional view showing a schematic configuration of an electric connection box according to the second embodiment.

EMBODIMENT OF THE INVENTION Below, it demonstrates in detail, referring drawings for embodiment of this invention. In addition, this invention is not limited by the following embodiment. In addition, components in the following embodiments include components that can be easily replaced by those skilled in the art, or components that are substantially the same.

[First embodiment]
First, an electric connection box according to a first embodiment will be described with reference to FIGS. 1 to 5. FIG. FIG. 1 is a perspective view showing a schematic configuration of an electric connection box according to the first embodiment. FIG. 2 is a partially exploded perspective view showing a schematic configuration of the electric connection box according to the first embodiment. FIG. 3 is a perspective view of a side cover that constitutes the electric connection box according to the first embodiment. FIG. 4 is a perspective view showing a schematic configuration of main parts of the electrical connection box according to the first embodiment. FIG. 5 is a partial vertical cross-sectional view showing a schematic configuration of the electrical connection box according to the first embodiment. Note that FIG. 3 shows a state in which the heat radiating member is attached to the side cover. It is assumed that FIG. 4 omits the housing 2, the side cover 6, and the sub-blocks.

Here, the X direction in FIGS. 1 to 5 (including FIGS. 6 to 8) is the depth direction of the electric connection box in the embodiment. In particular, the X1 direction is the depth direction, and the X2 direction is the front direction. The Y direction is the width direction of the electrical connection box in the embodiment, and is a direction orthogonal to the depth direction. The Z direction is the vertical direction of the electrical connection box in the embodiment, and is a direction perpendicular to the depth direction and the width direction. In particular, the Z1 direction is the downward direction, which is the mounting direction of the side cover. The Z2 direction is the upward direction, which is the removal direction of the side cover.

The electric connection box 1 according to the first embodiment is mounted on a vehicle body such as an automobile, for example, and receives power supplied from a power source such as a battery via various electronic components and the like, and various types of electric power supplied to the vehicle body. electronic devices. As shown in FIG. 1, the electrical connection box 1 is incorporated in the wire harness WH, and integrates electronic components 100 such as connectors, fuses, relays, branches, electronic control units, etc., which constitute connection processing components such as electric wires. are housed inside. The electric junction box 1 is installed in a place exposed to the external environment such as an engine room of a vehicle body, and is connected between a power supply such as a battery and various electronic devices mounted in the vehicle body. The electrical connection box 1 may also be called a junction box, a fuse box, a relay box, etc. In the following embodiments, these are collectively called an electrical connection box. The electrical junction box 1 includes a housing 2, a side cover 6, electric wires with terminals 7, a heat radiating member 8, and a busbar 10.

The housing 2 accommodates one or more electronic components 100 and a bus bar 10, which is a type of branch, in an internal space 2a formed therein. The housing 2 is made of an insulating synthetic resin and has a box-like shape. The housing 2 is formed by laminating a lower cover 5, a box main body 3, and an upper cover 4 in this order from the lower side. The box body 3, the upper cover 4, and the lower cover 5 are each provided with a locking mechanism. By engaging the locking mechanisms with each other, the box body 3 and the upper cover 4 are locked, and the box body 3 and the lower cover 5 are locked, thereby forming a waterproof structure. The housing 2 is attached to the vehicle body with the stacking direction of the lower cover 5, the box body 3, and the upper cover 4 aligned with the vertical direction. In the housing 2 of the present embodiment, the vehicle body mounting portion provided on the outside of the housing 2 is brought into contact with the vehicle body side, for example, a vehicle body side mounting panel or the like, and the vehicle body mounting portion and the vehicle body side are fastened with bolts or the like. and installed on the vehicle.

The box body 3 has a substantially rectangular outer peripheral shape when viewed from above and below with the electric connection box 1 installed on the vehicle body side. The box body 3 has a lower opening at its lower end and an upper opening at its upper end. The box main body 3 is formed in a hollow shape, and the lower opening and the upper opening communicate with each other in the vertical direction via an internal space 2a. The box body 3 has a peripheral wall 33 that forms part of the internal space 2 a of the housing 2 . The side cover 6 is attached to the outer peripheral surface 33 a of the peripheral wall 33 of the box body 3 . The box body 3 has an accommodation space 2c as part of the internal space 2a.

The accommodation space portion 2c is a space portion formed adjacent to the insertion space portion 2d in the housing 2 and communicating with the insertion space portion 2d. A portion of the peripheral wall 33 of the accommodation space 2c is cut out along the depth direction. An outer peripheral surface 33a of the peripheral wall 33 is formed at a position recessed toward the inner space 2a between both end portions 33b of the peripheral wall 33 which are notched and face each other in the depth direction. A space between both ends 33b of the peripheral wall 33 is closed by side covers 6 extending in the width direction and the vertical direction. A stud bolt S is arranged in the accommodation space 2c.

The insertion space 2d is a space provided in the housing 2 and communicating with the outside of the housing 2 through the opening 2b. The insertion space 2d is formed by the box body 3 and the side cover 6, as shown in FIGS. The insertion space 2d is opened at the upper end and the lower end. The upper opening 32 is closed by the upper cover 4 . The insertion space 2d communicates with the outside of the housing 2 through the opening 2b on the lower side. The opening 2b is a portion from which the electric wire with terminal 7 inserted through the insertion space 2d protrudes to the outside. Since the insertion space 2d is formed along the direction of inclination of the inclined wall 63 of the side cover 6, the opening 2b has a larger opening area than the opening on the upper side. In the insertion space 2d, the electric wire 7 with a terminal is inserted from the outside toward the accommodation space 2c through the opening 2b in a fastening state in which the terminal 71 of the electric wire 7 with the terminal is fastened to the stud bolt S by the nut N. be.

Here, the stud bolt S is a fastening member, and includes a bus bar 10 protruding from the space in which the electronic component 100 and the like are accommodated into the accommodation space 2c, and a terminal-equipped wire 7 protruding from the insertion space 2d into the accommodation space 2c. physically and electrically connect the For example, when power is supplied from a power supply on the vehicle body side, the power is delivered at one point by the stud bolt S, and the power can be distributed and supplied to each electronic component 100 via the bus bar 10 . The stud bolt S is attached to, for example, a mounting member for the stud bolt S connected to the inner peripheral surface of the peripheral wall 33, and is installed in the housing space 2c in a state of standing upward. The stud bolt S of this embodiment is physically and thermally connected to the heat dissipation member 8 . The stud bolt S has a threaded groove on its outer periphery. After inserting the bus bar 10, the electric wire with terminal 7, and the heat radiating member 8 into the stud bolt S in this order, the nut N is inserted into the stud bolt S and screwed. conclude these.

The side cover 6 is attached to the outer peripheral surface 33a of the box body 3 and extends downward. The side cover 6 is attached so as to block the space between both ends 33b of the peripheral wall 33 along the depth direction. In the attached state where the side cover 6 is attached to the outer peripheral surface 33a, the inner side surface 61 positioned on the inner space portion 3a side faces the outer peripheral surface 33a between the end portions 33b in the width direction. The side cover 6 is made of insulating synthetic resin. The side covers 6 are locked by locking portions 34 formed at both end portions 33b of the peripheral wall 33 for locking the side covers 6. As shown in FIG. The locking portion 34 is formed by a locking plate that protrudes from the outer peripheral surface 33a and extends upward when viewed in the width direction and the depth direction. The side cover 6 is vertically guided by guide portions 35 formed vertically on the peripheral wall 33 along opposite ends in the width direction while being locked by the locking portions 34 . Each guide portion 35 is formed to protrude forward from the outer peripheral surface 33a. The side cover 6 has a side cover body portion 62 and an inclined wall 63, as shown in FIGS.

The side cover body portion 62 is formed in a substantially rectangular shape when viewed from the width direction and the depth direction, and is formed to extend vertically along the downward direction. The side cover body portion 62 has an outer side surface 64 facing the inner side surface 61, and a locking portion 65 formed in a frame shape when viewed from the top and bottom, and a frame shape formed on the inner side surface 61 when viewed in the depth direction. and a holding portion 66 . The locking portion 65 locks the side cover 6 to the box body 3 by inserting and fitting the locking portion 34 of the box body 3 when the side cover 6 is attached to the box body 3 from the mounting direction. It is. The holding portion 66 holds the heat radiating member 8 on the side cover 6 . As shown in FIG. 3 , the holding portion 66 is formed at a position facing the inner surface 61 with the heat radiating member 8 interposed therebetween when the heat radiating member 8 is held by the side cover body portion 62 . The holding portion 66 is formed so as to connect both sides of the insertion space portion 2d facing each other in the width direction in the attached state.

The slanted wall 63 is slanted to secure a gap between the side cover 6 and the electric wire with terminal 7 . The inclined wall 63 is formed so as to protrude from the lower end portion of the side cover body portion 62 . The side cover body portion 62 and the inclined wall 63 are formed continuously and integrally. The inclined wall 63 extends downward and is inclined in a direction away from the box body 3 .

The terminal-equipped electric wire 7 supplies electric power to a plurality of electronic components 100 through stud bolts S from an electronic component outside the housing 2 such as a battery mounted on a vehicle body. The terminal-equipped wire 7 has a terminal 71 and a wire body 72 .

Terminal 71 is a metal LA terminal. Terminal 71 is electrically connected to bus bar 10 by being fastened to stud bolt S. As shown in FIG. The terminal 71 is a plate-like member and is formed to extend in a substantially rectangular shape having long sides. Terminal 71 has a through hole 71a at one end in the extending direction. The through hole 71a is a hole through which the stud bolt S penetrates. The terminal 71 has a crimp portion 71b on the other end side in the extending direction. The crimping portion 71b protrudes laterally at both ends in the direction orthogonal to the extending direction, that is, in the short side direction, and deforms so as to wrap the outer periphery of the wire body 72 placed on the terminal 71 to hold it. The terminal 71 is bent between the through hole 71a and the crimp portion 71b in the extending direction. That is, the terminal 71 extends from the accommodation space 2c to the insertion space 2d in a state of being fastened to the stud bolt S, and is bent in the insertion space 2d to extend downward. be. Since the terminal 71 is bent as described above while being fastened to the stud bolt S, the surface on which the wire body 72 is placed faces the side cover 6 .

The electric wire main body 72 has conductivity, and electrically connects the terminal 71 with electric power outside the housing 2 , that is, an electronic component such as a power source on the vehicle body side. The electric wire main body 72 is formed by bundling a plurality of conductor wires and covering the outer periphery of the bundled conductor wires with an insulator. A portion of the wire body 72 including at least the end portion 72a is positioned in the insertion space portion 2d. The electric wire main body 72 exposes the electric wire to the outside of the insulator at the end portion 72a, and the terminal 71 is crimped. The wire body 72 protrudes and extends from the insertion space 2d to the outside of the housing 2 through the opening 2b at the lower end of the insertion space 2d.

The heat dissipating member 8 is a heat conducting member having thermal conductivity, and is formed, for example, by pressing a plate-like metal material. The heat radiating member 8 is thermally connected to the terminal-equipped wire 7 in the accommodation space 2c. The heat radiating member 8 protrudes from the housing space 2c into the insertion space 2d and extends toward the opening 2b. The heat dissipation member 8 of this embodiment has two bent portions 81 , a thermal connection portion 82 and an extension portion 83 .

The two bent portions 81 are portions that bend between the thermal connection portion 82 and the extension portion 83 . Each bent portion 81 of this embodiment is bent in the same direction toward the stud bolt S in a state where the heat radiating member 8 is fastened to the stud bolt S. As shown in FIG.

The thermal connecting portion 82 is a portion that is thermally connected to the terminal-equipped wire 7 and extends in the extending direction from the upper bent portion 81 toward the terminal-equipped wire 7 . The thermal connection portion 82 of the present embodiment is fastened together with the terminal 71 of the electric wire 7 with a terminal and the bus bar 10 to the stud bolt S arranged in the accommodation space portion 2c. The thermal connection portion 82 is exposed from the holding portion 66 in the holding state described above. The thermal connection portion 82 has a through hole 8a. The through hole 8a is a hole through which the stud bolt S penetrates.

The extension portion 83 is a portion that extends downward in the vertical direction intersecting the extension direction from the thermal connection portion 82 via the two bent portions 81 . As shown in FIG. 5 , in the connected state where the heat radiating member 8 is thermally connected to the electric wire 7 with terminals, the end of the extending portion 83 is positioned below the terminal 71 of the electric wire 7 with terminals. It is located between the side edge and the opening 2b.

The busbar 10 is a conductive member having electrical conductivity, and constitutes a part of an electric circuit passing through the electrical connection box 1 . The bus bar 10 has one end electrically connected to the plurality of electronic components 100 accommodated in the internal space 2a and the other end electrically connected to the terminal-equipped wire 7 on the electric path. As shown in FIG. 4, the bus bar 10 is formed by pressing a metal plate or the like. The busbar 10 has a through hole 10a in a portion to be fastened with the stud bolt S, and the stud bolt S is inserted through the through hole 10a while being housed in the internal space 2a.

Next, the procedure for assembling the electrical junction box 1 according to this embodiment will be described. First, a worker assembles electric wires (not shown) and bus bars 10 connected to stud bolts S to sub blocks (not shown) to be accommodated in the internal space 2a of the box body 3 to produce a sub-harness. Next, the operator inserts the sub-block together with the sub-harness into the internal space 2a from the lower side of the box body 3, and fits and fixes the block mounting member of the box body 3 and the like. Next, the worker mounts the electronic component 100 on each block from the upper side of the box body 3 and electrically connects the electronic component 100 and the electric wire. Next, the worker attaches the stud bolt S to the stud bolt S attachment member installed in the housing space 2 c of the box body 3 .

Next, the operator removes the covering member and places the end portion 72 a of the electric wire body 72 with the conductor wire exposed on the terminal 71 . Next, the operator uses a jig to bend the terminal 71 at a substantially right angle between the through hole 71a and the crimping portion 71b in the extending direction of the terminal 71 . The bending direction of the terminal 71 is the direction in which the surface on which the wire body 72 is placed faces the peripheral wall 33 when the wire with terminal 7 is fastened to the stud bolt S. Next, the worker uses a jig to deform the crimping portion 71 b so as to surround the end portion 72 a of the wire body 72 , and crimp the terminal 71 to the wire body 72 .

Next, the worker inserts the terminal-equipped electric wire 7 into the insertion space portion 2d, and inserts the stud bolt S into the through hole 71a formed in the terminal 71 in the housing space portion 2c. Next, the worker inserts the heat radiating member 8 through the holding portion 66 of the side cover 6 . At this time, the thermal connection portion 82 provided with the through hole 8a is exposed from the holding portion 66 in the holding state described above. Next, the worker attaches the side cover 6 to which the heat radiating member 8 is assembled to the box body 3 from the upper side toward the lower side along the guide portion 35 of the box body 3 . At this time, the worker attaches the side cover 6 to the box main body 3 and inserts the stud bolt S through the through hole 8a formed in the thermal connection portion 82 in the accommodation space portion 2c.

Next, the worker inserts the stud bolt S into the through hole formed in the nut N and having a thread groove on the inner peripheral surface thereof in the accommodation space 2c, and rotates the nut N to screw it onto the stud bolt S. . As the worker continues to screw the nut N onto the stud bolt S, the nut N contacts the thermal connection portion 82 . When the operator can no longer screw the nut N onto the stud bolt S, the terminal 71 of the electric wire with terminal 7 and the thermally connecting portion 82 of the heat radiating member 8 are attached to the stud bolt S together with the nut N. be concluded.

As described above, the electric connection box 1 according to the first embodiment includes the insertion space 2d communicating with the outside of the housing 2 through the opening 2b, and the bus bar 10, which communicates with the insertion space 2d. It comprises an accommodation space portion 2c and a heat radiating member 8 having thermal conductivity and thermally connected to the terminal-equipped wire 7 in the accommodation space portion 2c. The electric wire 7 with terminal is inserted through the insertion space 2d through the opening 2b and electrically connected to the bus bar 10 in the accommodation space 2c. The heat radiating member 8 protrudes from the housing space 2c into the insertion space 2d and extends toward the opening 2b. Therefore, even if the connecting portion between the electric wire 7 with terminal and the bus bar 10 is heated by energization, the heat radiating surface is enlarged by the heat radiating member 8 connected to the electric wire 7 with terminal. It becomes possible to suppress the rise. Further, since the heat radiating member 8 protrudes from the accommodating space 2c into the insertion space 2d and extends toward the opening 2b, the heat radiating surface can be made longer, and the heat radiating member 8 can come into contact with the outside air through the opening 2b. It becomes easy, and the effect of suppressing the temperature rise can be further exhibited.

The electrical junction box 1 also has a thermal connection portion 82 where the heat dissipation member 8 is thermally connected to the terminal-equipped wire 7 and extends in the extending direction from the bent portion 81 toward the terminal-equipped wire 7 . The thermal connection portion 82 is fastened to the stud bolt S arranged in the accommodation space portion 2c together with the terminal of the electric wire 7 with the terminal and the bus bar 10 . Therefore, it is possible to connect the heat radiating member 8 to the terminal-equipped wire 7 that supplies power from outside the housing 2 without changing the structure or assembly method of the terminal-equipped wire 7 and the bus bar 10 that are fastened together with the stud bolt S. It becomes possible. As a result, temperature rise due to energization can be suppressed.

Further, in the electric connection box 1, in the connected state where the heat dissipation member 8 is thermally connected to the electric wire 7 with terminals, the end portion of the extending portion 83 is opened to the lower side end portion of the terminal 71 of the electric wire 7 with terminals. It is located between the part 2b. Therefore, it is possible to prevent short-circuiting of the electrical circuit due to the extended portion 83 protruding from the opening 2b and coming into contact with other components. In addition, since the ends of the extending portions 83 extend further than the ends on the lower side of the terminals 71 of the electric wires 7 with terminals, it is possible to bring the heat radiating member 8 closer to the opening 2b.

The electric connection box 1 is attached to the outer peripheral surface 33 a of the housing 2 , and the side cover 6 extending downward is guided from the upper side toward the lower side by the guide portion 35 of the housing 2 . be. The heat radiating member 8 is held by the holding portion 66 of the side cover 6 . Therefore, for example, an operator can insert the stud bolt S into the through hole 8a of the heat radiating member 8 at the same time as attaching the side cover 6 to the housing 2, and the electric junction box 1 can be assembled without changing the assembly method. can be assembled.

In the first embodiment, the heat dissipation member 8 is fastened to the stud bolt S in a state of being vertically sandwiched between the terminal 71 of the electric wire 7 with a terminal and the nut N, but is limited to this. not a thing For example, the bus bar 10 and the terminals 71 of the electric wires 7 with terminals may be fastened to the stud bolts S in a state of being sandwiched in the vertical direction.

[Second embodiment]
Next, an electric connection box according to a second embodiment will be described. FIG. 6 is a partially exploded perspective view showing a schematic configuration of an electric connection box according to the second embodiment. FIG. 7 is a perspective view showing a schematic configuration of main parts of an electric junction box according to the second embodiment. FIG. 8 is a partial vertical cross-sectional view showing a schematic configuration of an electric connection box according to the second embodiment. 7, the housing 2, the side cover 6, the stud bolt S, and the electric wire with terminal 7 are omitted.

The electric junction box 1A according to the second embodiment differs from the electric junction box 1 according to the first embodiment in that the shape of a part of the heat radiating member 8 and the bus bar 10 is different. Note that the electrical junction box 1A according to the second embodiment has the same basic configuration and basic operation as compared with the electrical junction box 1 according to the first embodiment, so the parts with the same reference numerals are omitted. Alternatively, the explanation is simplified.

As shown in FIG. 7, the heat dissipation member 8A has a thermal connection portion 82A having a different shape from the thermal connection portion 82 of the first embodiment. The thermal connection portion 82A is the busbar 10A electrically connected to the electric wire 7 with the terminal in a fastening state in which the terminal 71 of the electric wire 7 with the terminal and the busbar 10A are fastened to the stud bolt S arranged in the accommodation space 2c. is locked by a locking mechanism 91 to a locking piece 10b erected from the end of the . The locking piece 10b extends from the busbar 10A in the same direction as the stud bolt S (upward) when the busbar 10A is accommodated in the housing 2. As shown in FIG. The two bent portions 81 of this embodiment are bent in different directions in a locked state in which the thermal connection portion 82A is locked by the locking piece 10b.

The thermal connection portion 82A has a locking mechanism 91, a base portion 92, and two connection portions 93,94. The locking mechanism 91 and the connecting portions 93 and 94 extend downward in the locked state. The connecting portions 93 and 94 are flat plate-like constituent portions. The planar shape of the connecting portion 93 is, for example, a rectangle. The connection portions 93 and 94 extend from the base portion 92 so that both surfaces of the connection portions 93 and 94 and both surfaces of the base portion 92 are positioned on the same plane. That is, as shown in FIG. 7, the thermal connection portion 82A is configured such that the base portion 92 and the connection portions 93 and 94 form a continuous flat plate when viewed along the depth direction. The connecting portions 93 and 94 are arranged with a gap along the depth direction.

The locking mechanism 91 extends from between the two connecting portions 93,94. A slit is formed between the locking mechanism 91 and the two connecting portions 93 and 94, respectively. The slit extends along the vertical direction. The locking mechanism 91 cooperates with the connecting portions 93 and 94 to sandwich the locking piece 10b. The locking mechanism 91 is configured such that the contact portion that contacts the locking piece 10b presses the thermal connection portion 82A toward the locking piece 10b. When the locking piece 10b is inserted between the connection portions 93, 94 and the contact portion, the locking mechanism 91 is elastically deformed so that the contact portion is separated from the locking piece 10b. The locking mechanism 91 sandwiches the locking piece 10b between the connecting portions 93 and 94 by elastic restoring force, and holds the locking piece 10b in cooperation with the connecting portions 93 and 94 .

Next, a procedure for assembling the electrical connection box 1A according to this embodiment will be described.

In the present embodiment, the worker inserts the heat radiating member 8A through the holding portion 66 of the side cover 6 before inserting the stud bolt S into the through hole 71a formed in the terminal 71 in the accommodation space portion 2c. At this time, the thermal connection portion 82A having the locking mechanism 91 is exposed from the holding portion 66 in the holding state described above. Next, the worker attaches the side cover 6 to which the heat radiating member 8 is assembled to the box body 3 from the upper side toward the lower side along the guide portion 35 of the box body 3 . At this time, the worker assembles the side cover 6 to the box main body 3, and inserts the locking piece 10b between the locking mechanism 91 and the connecting portions 93, 94 so as to lock the housing space 2c. The thermal connection portion 82A is engaged with the piece 10b.

Next, the worker inserts the stud bolt S into the through hole formed in the nut N and having a thread groove on the inner peripheral surface thereof in the accommodation space 2c, and rotates the nut N to screw it onto the stud bolt S. . When the worker keeps screwing the nut N onto the stud bolt S, the nut N comes into contact with the terminal 71 of the electric wire 7 with a terminal. When the worker can no longer screw the nut N onto the stud bolt S, the terminal 71 of the electric wire 7 with terminals is fastened to the stud bolt S together with the nut N.

As described above, the electric junction box 1A according to the second embodiment has the same effects as the electric junction box 1 according to the first embodiment, and the heat radiating member 8A can be easily assembled to the bus bar 10A. can.

Also, the electric connection box 1A is locked in a fastening state in which the terminals of the electric wires 7 with terminals and the busbar 10A are fastened to the stud bolts S arranged in the housing space 2c. A mechanism 91 engages an engaging piece 10b erected from the end of the busbar 10A. Therefore, it is possible to connect the heat radiating member 8A to the terminal-equipped wire 7 that supplies power from outside the housing 2 without changing the structure or assembly method of the terminal-equipped wire 7 and the bus bar 10A that are fastened together with the stud bolt S. It becomes possible. As a result, temperature rise due to energization can be suppressed.

Also, in the electric connection box 1A, in the connected state where the heat radiating member 8A is thermally connected to the bus bar 10A, the end of the extending portion 83 is connected to the lower end of the terminal 71 of the electric wire with terminal 7 and the opening 2b. located between Therefore, the same effect as that of the electrical connection box 1 according to the first embodiment is obtained.

In addition, in the said 1st and 2nd embodiment, although the thermal radiation member 8 and 8A has the two bending parts 81, it is not limited to this. For example, the number of bent portions 81 may be one, or three or more.

1, 1A electrical connection box 2 housing 2a internal space 2b opening 2c housing space 2d insertion space 3 box main body 33 peripheral wall 33a outer peripheral surface 34 locking portion 35 guide portion 4 upper cover 5 lower cover 6 side cover 62 side cover Body portion 63 Inclined wall 64 Outer surface 7 Wire with terminal 71 Terminal 72 Wire body 8, 8A Heat dissipation member 81 Bent portion 82 Thermal connection portion 83 Extension portion 8a Through hole 91 Locking mechanism 92 Base portion 93, 94 Connection portion 10, 10A Bus bar 10a Through hole 10b Locking piece 100 Electronic component N Nut S Stud bolt WH Wire harness

Claims (5)

a housing housing one or more electronic components;
a conductive member electrically connected to at least the electronic component;
an insertion space provided in the housing and communicating with the outside of the housing through an opening;
an accommodation space portion that accommodates the conductive member and communicates with the insertion space portion;
With a terminal that is inserted through the insertion space through the opening, is electrically connected to the conductive member in the accommodation space, and supplies power to the electronic component from outside the housing through the conductive member an electric wire;
a heat dissipating member that has thermal conductivity and is thermally connected to at least one of the terminal-equipped wire and the conductive member in the accommodation space;
with
The heat dissipation member is
projecting from the accommodation space into the insertion space and extending toward the opening;
The heat dissipation member is
at least one bend;
a thermal connection portion thermally connected to the terminal-equipped wire;
an extending portion extending downward in a vertical direction intersecting the extending direction of the thermal connection portion from the thermal connection portion via the bent portion.
An electrical connection box characterized by: The thermal connection is
2. The electric connection box according to claim 1, which is fastened together with the terminal of the electric wire with the terminal and the conductive member to a fastening member arranged in the housing space. The thermal connection is
In a fastening state in which the terminal of the electric wire with the terminal and the conductive member are fastened to the fastening member arranged in the housing space, the terminal is erected from the end of the conductive member electrically connected to the electric wire with the terminal. 2. The electric connection box according to claim 1, wherein the electrical connection box is locked to the locking piece by a locking mechanism. The heat dissipation member is
In a connected state in which at least one of the electric wire with terminal and the conductive member is thermally connected, the end of the extending portion is positioned between the lower end of the terminal of the electric wire with terminal and the opening. The electric connection box according to claim 2 or 3. a housing housing one or more electronic components;
a conductive member electrically connected to at least the electronic component;
an insertion space provided in the housing and communicating with the outside of the housing through an opening;
an accommodation space portion that accommodates the conductive member and communicates with the insertion space portion;
With a terminal that is inserted through the insertion space through the opening, is electrically connected to the conductive member in the accommodation space, and supplies power to the electronic component from outside the housing through the conductive member an electric wire;
a heat dissipating member that has thermal conductivity and is thermally connected to at least one of the terminal-equipped wire and the conductive member in the accommodation space;
with
The heat dissipation member is
projecting from the accommodation space into the insertion space and extending toward the opening;
The housing is
a side cover attached to the outer peripheral surface and extending downward;
a guide portion that guides the side cover from the upper side toward the lower side;
has
The insertion space is
formed by the housing and the side cover,
The side cover is
It has a holding portion that holds the heat radiating member.
An electrical connection box characterized by:

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